class B {
  int x = 100,y = 200;
  public void setX(int x) {
    x = x;
  }
  public void setY(int y) {
    this.y = y;
  }
  public int getXYSum() {
  return x+y;
  }
}
public class A4_2 {
  public static void main(String args[]) {
    B b = new B();
    b.setX(-100);
    b.setY(-200);
    System.out.println("sum="+b.getXYSum());
  }
}
